1. Those in which the sole difference from weak, or so-called regular verbs, is that the imperfect past of the indicative consists of only one syllable, and is not distinguished by the addition of ede, or te, this being in point of fact the one character which all strong verbs have in common; as,
Infinitive. Indicative. Present. Imp. Past. Past-Part. at græde, to weep. jeg, &c., græder. græd. grædt. pl. vi, &c., græde. (for all persons)
2. Those which change the radical vowel only in the imperfect past of the indicative, and in the past participle; as,
at drive, to drive, jeg driver, drev, drevet. pl. vi drive, (for all persons)
3. Those which change the radical vowel only in the imperfect past of the indicative; as,
at bide, to bite, jeg bider, bed, bidt. pl. vi bide, (for all persons).
4. Those which take a different vowel in the imperfect past of the indicative, and in the past participle, both of which differ from the radical vowel; as,
at drikke, to drink, jeg drikker, drak, drukket. pl. vi drikke, (for all persons.)
It will be observed, (1) that in all verbs, whether belonging to the weak (or regular), or to the strong (or irregular) groups, the present of the indicative is formed directly from
